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Old 15th November 2010, 01:43 PM   #1
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Default Potentiometers

im confuse please tell me what are the pinouts correspond to....

thank you!!!
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Old 15th November 2010, 02:12 PM   #2
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Possibly it has an on/off switch, but whether it's 4 on the front and back, or 1 on the front and back, I'm not sure. It is very easy to find out with an ohm meter.
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Old 15th November 2010, 02:26 PM   #3
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Looks like a standard log. stereo volume control. Pin 4 is the tap for loudness correction, 3=ground, 2=wiper, 1=input.
E
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Old 15th November 2010, 02:42 PM   #4
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Default potentiometer

I think it's an level potentiometer ,dual for stereo ,with median terminal for loudness control . See picture below .
Alex.
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Old 16th November 2010, 02:28 AM   #5
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the first terminal is the center tap , is the ground terminal the terminal number 4? or 2?... when i turn the pot every slight turn there is like a hole (i dont know the proper term sorry) , i mean there is like an ending in every slight turn.... hope you can helped me guys...
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Old 16th November 2010, 02:32 AM   #6
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heres the circuit diagram,.. i think this is in top view, the first terminal with be ground or the last im really confused...
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File Type: jpg scanned002.jpg (114.8 KB, 136 views)
File Type: jpg scanned0023.jpg (244.8 KB, 136 views)

Last edited by aMateRasU; 16th November 2010 at 02:39 AM. Reason: addititonal...
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Old 16th November 2010, 04:15 AM   #7
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Does it have any labeling that tells you who made that pot or what kind of labeling can you find on that pot ?
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Old 16th November 2010, 04:36 AM   #8
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no labels ser except for B100K
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Old 16th November 2010, 04:41 AM   #9
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B can be a log characteristic if it is an old pot. More modern pot are labeled A now for log.
My first asumption was that this is a volume pot with a physilogical loudness control but you say that there are "holes". Does that meen that the pot does not conduct in certain places over the adjustment range ?
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Old 16th November 2010, 04:42 AM   #10
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you can check it by a DVM set in resistance.

as per the diagram you supplied it is connected to loudness control.. meaning it is a center tap potentiometer.

1 and 2 is variable resistance while turning the pot

3 and 2 is variable resistance while turning the pot

1 and 3 fixed resistance (total resistance of the pot)

3 and 4 fixed resistance (half of total resistance)

1 and 4 fixed resistance (half of total resistance)

in short center tap is fixed resistance.
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File Type: gif CENTER TAP.GIF (4.2 KB, 115 views)

Last edited by coolet; 16th November 2010 at 04:44 AM.
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